Host Interface (HDI08)
HDI08 – External Host Programmer’s Model
MOTOROLA
DSP56367
8-19
must read or write the appropriate HDI08 register (clearing HRDF or HTDE, for example) to
clear the interrupt. In the case of host command interrupts, the interrupt acknowledge from the
DSP core program controller clears the pending interrupt condition. Figure 8-11 illustrates the
HSR-HCR operation.
Figure 8-11 HSR-HCR Operation
8.6
HDI08 – EXTERNAL HOST PROGRAMMER’S MODEL
The HDI08 has been designed to provide a simple, high speed interface to a host processor.
To the host bus, the HDI08 appears to be eight byte-wide registers. Separate transmit and
receive data registers are double-buffered to allow the DSP core and host processor to transfer
data efficiently at high speed. The host may access the HDI08 asynchronously by using
polling techniques or interrupt-based techniques.
The HDI08 appears to the host processor as a memory-mapped peripheral occupying 8 bytes
in the host processor address space (See Table 8-8). The eight HDI08 include the following:
•
A control register (ICR)
•
A status register (ISR)
•
Three data registers (RXH/TXH, RXM/TXM and RXL/TXL)
15
0
HF3
HF2
HCIE
HTIE
HRIE
ENABLE
HCR
HF1
HF0
HCP
HTDE
HRDF
15
0
X:HSR
X:HCR
DSP CORE INTERRUPTS
RECIEVE DATA FULL
TRANSMIT DATA EMPTY
HOST COMMAND
HSR
STATUS
Summary of Contents for DSP56367
Page 16: ...xvi MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Page 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Page 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Page 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Page 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Page 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Page 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Page 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Page 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Page 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Page 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Page 522: ...Index 6 MOTOROLA Index ...
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